N-Loop Perfect Celtic Knot Seeks Perfect Sphere
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- Опубликовано: 30 сен 2024
- www.AsWoodTurns...
This journey thru Celtic knots has resulted in an easy and repeatable process that greatly simplifies preparation of the turning stock. In previous descriptions, the project wood had to be milled to exact dimensions: squares for four loops being the easiest, triangles for three loop, pentagons for five loops.
The significant realization was that it's not the wood that has to be milled. The milled wood was shaped to provide positioning for the cutting angles. Instead, we only need to make plywood polygons that can be attached to the ends of the wood to maintain positions.
To summarize the process:
1. Prepare appropriate stock for the project. The only requirement is that the two opposite end be parallel and their centers drilled to a shallow depth.
2. Prepare paper templates with polygons with sides equal to the number of loops desired in the Celtic knot: triangle for three loops; square for four loops; pentagon for five loops and so on.After the previous video with a Celtic knot in a barbecue flipper, several comments included a suggestion to leave a little wood when the angle cut is made to keep the wood spaced correctly. In addition Michael challenged me to make a 3 loop Celtic knot. The project wood must fit inside and be centered on the center of the polygon.
3. Glue the templates to plywood, rough cut, and sand down to the perimeter line.
4. Temporarily glue the plywood polygons to the ends of the project wood. Use a small nail thru the plywoods' center and into the center of the project wood.
5. Choose a cut angle for the knot.
6. Prepare the saw with appropriate stops and supports. Do NOT change any stop or support until the project is completed to reduce the opportunity for error.
7. Set the depth of cut to allow a thin piece of wood to remain connecting the otherwise two pieces of wood. Use scrap wood temporarily glued to the project wood to supplement and reinfore the cut area before making the cut.
8. Make the cut.
9. Prepare contrasting spline material to easily slide into the saw kerf.
10. Glue spline into the saw kerf. Work quickly to insert and position the spline before the glue sets. Do not use CA glue.
11. Clean up excess spline material and the scrap reinforcements.
12. Repeat steps 8,10, & 11 for each additional knot loop.
13. Finish turn the project. Hurrah.
How to make a perfect sphere or ball.
1. Prepare a faceplate with a cup that fits the rough ball. Find a rubber stopper about twice as large as your threaded(hopefully) live center. Drill to fit the live center.
2. Measure the diameter of the spindle. Mark that length on the spindle, centering as necessary.
3. Partially part outside these marks to indicate the top and bottom. Rough turn the ball between centers. Make a pencil line at the equator (largest center) of the ball.
4. Saw off the small tenons.
5. Rotate the rough ball 90 degrees and mount to the cup faceplate, holding it with the rubber stopper on the live center. The equator line should now run parallel to the turning axis.
6. Use a scraper or other gentle tool to carefully remove any wood higher than the equator line but be sure to leave the line.
7. Mark a new equator line.
8. Rotate the ball 90 degrees so the new equator line is parallel to the turning axis.
9. Use a scraper or other gentle tool to carefully remove any wood higher than the equator line but be sure to leave the line.
10. If satisfied, move on to sanding. Otherwise, repeat steps 7, 8, and 9 until you are.
11. For each sanding grit repeat the same ball rotations used to turn the ball but don't mark equator lines. Do the same process by eye. That will be good enough for sanding.
Good turning.
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Nice job Alan, pity about that one slice that wouldn't fit. Still turned out very nice, cheers Harry
The Little Garden Shed Workshop I was really disappointed at that point.
But it worked out
Alan
Amazing! Sorry you had trouble with that one insert. Still amazing to see.
Cip's Wood Chips That insert was a downer. Almost threw it away.
Thanks Cip
Alan
An absolutely brilliant demonstration of skill, and perseverance Alan. Beautiful piece, and a great video.
Take care
Mike
Mike Waldt Thank you Mike
Alan
Cool. Do you describe the cut angles anywhere? I don't quite understand the how you set up the cuts. Also, what is the purpose of the fiberboard pieces stuck on after each cut?
Mark Hazlewood The cut angle is a matter of choice. On this project it was 45 degrees although I wanted a steeper angle for this number of loops. I clamped a stop on the saw to position the cut. I used the fiberboard to add bulk to the wood to strengthen the thin piece left to maintain the positioning of the two ends. Otherwise, the thin piece not cut may have broken causing me to loss the advantage of leaving it. It was insurance.
Hope this helps.
Alan
Just found this and it makes a great addition to your other Celtic knot videos - exceptional teaching - thank you.
You're very welcome! Richard
Alan
What would happen if you made all of your cuts and then put the piece into a pressure chamber with resin vs. the wood shims?
Then there would be no joints in the splines. The problem to work out is how to hold the pieces while cutting and in the pressure pot before the resin hardens.
Alan
Hi Alan....I'm a Subscriber and just getting around to finding your most interesting video on making the Celtic Knot Sphere. Could you please tell me the saw angle you used on this particular project....looks like 45, but not sure. Looks great at the angle you used and just have to try one of these.....thanks
Can you believe that I never decide on an angle before hand. In reality, I adjust until it looks good. :)
Alan
@@AsWoodTurns @As Wood Turns Hi Alan, my Celtic Knot sphere is completed and it came out great. Many of your tips were very useful, epecially the recommendation of starting out with a round roughed black as it did not take up as much space within the Hexagon. My goal now as I'm sure is yours, is how to come up with a larger diameter Sphere when relying on the table saw or chop saw for method of getting a smooth cut out slot. Band saw would be ideal, but the cut is just to rough. Please share if you come up with somthing and I'll do the same.....love a good challenge.
Thanks for the great video, I'll be trying this soon.
Go for it.
Merry Christmas
Alan
Very intriguing, great project. What are the angle of the cuts?
Pablo Gazmuri on this project the cut angle was 45 degrees, the max that my chop saw could do, which is another potential limitation of a chop saw.
Alan
Your knot is a 5part 4bight turks head, or 5Lead 4bight Turks head. I know these knots very well. I’m a knot tier and braider.
Knot being an expert knots, Knot a problem.
Alan
Here’s a site with tools that you ca’n download.
www.igkt.net/knotting-basics/knotting-tools
I helped out in the tool that is at the bottom of the list. Two of the tool have to be installed on windows os. The last one on the page can be used in
Google browser
FireFox browser
Safari browser to which they all can be used o9r \installed in Mac, windows and Linux os’s....
Just message me if you ‘need help.
Brian
Here’s a Celtic knot generator
w-shadow.com/celtic-knots/
i do 6 loop knots in a pen blank using my bandsaw
Thank you for sharing
Alan
That's too bad about that one slice that wouldn't fit. Still turned out pretty good. Just hollow it out now and you have one really nice christmas ornament!
Derek Oliver I agree - The Christmas Ornament Challenge is coming up.
Alan
Stunning demo and outcome.
Philip Morrish Thank you.
Alan
Great job Alan!
I was able to follow almost all your steps. I'm not quite sure how deep the cuts are. I noticed your splines have a curved edge. Is that to accommodate the curve of your chop saw blade when you place the splines in the kerf?
Just so I'm sure, you leave the saw angle set the same for all cuts.
Thanks in advance for your reply.
Bob
Spokane, WA
Robert Schmidt Depth of cut - as much as possible but leave enough to hold the two pieces without breaking.
On the curve, yes, since my chop saw would not go all the way, I tried to maximize the spline. I did not have to do that when using my table saw.
Unless you're getting ultra-fancy, leave the angle alone. in fact, leave the whole setup so you do introduce error setting it up over again.
Great questions.
Alan
Nice process! Thanks
Xyienced Having a defined process helps.
Thank you
Alan
I really enjoyed this video. Thanks for putting it together. I use my bandsaw all the time for making Celtic knots for my pen...
Mike
MikesPenTurningZ
+Mike Schmitt You're welcome. Glad they're useful.
Alan
Job, well done. Bob
Robert Goggin Thank you Bob
Alan
Another great video, Alan!!! Thanks for sharing.
Cheers.
Mauro
Mauro il tornitore You're selcome Mauro
Thank you.
Alan
Great job, I have many projects that go to the scrap pile halfway through. I like it when problems are not edited out so I learn what to do if/when it happens to me. Thanks Alan.
Butch Shelton Well, that one was seconds away from the scrap pile until I cooled off.
Thanks for commenting.
Alan
Awesome job as always!! I think it turned out great and I always learn something watching you. Thanks for another great one!!
Cody
Cody W Thank you Cody - I'm learning too.
Alan
yet another wonderfully instructive video .
would a scroll saw work better or perhaps a metal cutting band saw blade would have a finer cut perhaps
also looking at your buffing set up as a cheaper option i use a couple of scrap wood plugs ,and the sheep skin inserts for a paint roller .
you can even put two different grit compounds on at the same time one at each end
spoplehughes Great ideas for buffing. I'd do it if I had not already purchased the buffing system.
Alan
Very well done. Great technique, good explanation.
SJWoodworks Thank you.
Alan
You did it! Excellent video and result despite the snafu with having to use sawdust and glue to do the repair.
Stephen Ellis Yes, what a relief that the sawdust turned out ok.
Alan
An amazing journey with the celtic knot. Like your videos a lot.
convalair Thank you. Stayed tuned....
Alan
7 loop celtic knot on a vase
jmp that is a challenge for you to try do
jmp With this process, 7 is simply a heptagon and 2 more cuts. The greater challenge is if the diameter exceeds the capacity of my chop saw or table saw.
Alan
Alan you are the Master!!! I suppose it comes back to practise, practise and more practise? Cheers, Sean
Practice and Process. A good Celtic knot depends on a good repeatable setup.
Thank you
Alan
Well Done and interesting project. Thanks.
Mark Choitz Thank you Mark,
Alan
Nice thought provoking series Alan. Thanks for sharing.
Alex Pettigrew Thank you Alex. I learned a lot.
Alan
Great job Alan, l have done a few Celtic knot conrainers and love them. A suggestion if I may, should you encounter this problem with the inlay again
Leave in place and allow to dry then pare level with the stock then recut the piece in exactly the same spot this will remove the bad inlay and allow you to get a perfect fit.
Regards
Frank
Frank Fitzpatrick Thanks for the suggestion. it should have worked. However, I hope never to have to use it.
Alan
Likewise Alan :)
One word. "WOW!" Thanks for sharing.
It did turn out nice. :)
Alan
Amazing job on this turn. Thanks for sharing.
Lee Waterman You're welcome Lee
Thank you
Alan
Nice job Alan, I have trouble figuring it out from scratch.
Rob Hampton Hope this helped.
Alan
Joli travail Alan, un belle sphère avec les inserts blancs, une belle idée!
para05100 Merci. C'est tres joli.
Alan
Excellent... Great job...
Cheers...
Adam Quincey Thank you Adam
Alan
Beautiful and inspiring!
woodstoney Thank you - more to come.
Alan
Great job!
kaziklu79 Thank you
Alan